EP0108899B1 - An electronic document distribution network with uniform data stream - Google Patents

An electronic document distribution network with uniform data stream Download PDF

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Publication number
EP0108899B1
EP0108899B1 EP83109604A EP83109604A EP0108899B1 EP 0108899 B1 EP0108899 B1 EP 0108899B1 EP 83109604 A EP83109604 A EP 83109604A EP 83109604 A EP83109604 A EP 83109604A EP 0108899 B1 EP0108899 B1 EP 0108899B1
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EP
European Patent Office
Prior art keywords
processor
document
processing
data stream
parameters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP83109604A
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German (de)
English (en)
French (fr)
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EP0108899A3 (en
EP0108899A2 (en
Inventor
Gregory John Foster
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International Business Machines Corp
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International Business Machines Corp
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Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0108899A2 publication Critical patent/EP0108899A2/en
Publication of EP0108899A3 publication Critical patent/EP0108899A3/en
Application granted granted Critical
Publication of EP0108899B1 publication Critical patent/EP0108899B1/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F40/00—Handling natural language data
    • G06F40/10—Text processing
    • G06F40/12—Use of codes for handling textual entities
    • G06F40/149—Adaptation of the text data for streaming purposes, e.g. Efficient XML Interchange [EXI] format
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F40/00—Handling natural language data
    • G06F40/10—Text processing
    • G06F40/166—Editing, e.g. inserting or deleting

Definitions

  • This invention relates to electronic document distribution systems or networks and is particularly directed to the means for handling a uniform data stream between the varying communicating processors participating in the network.
  • the system must be easy to use if it is to be effective. Also, the complexities of the various interface and data forms must be transparent to the users. In other words, the system must handle and distribute the documents with a minimum of operator intervention. To expect the sender of information to know very much about processor and data form requirements is unrealistic. The sender should be able to request that information be distributed. He should not have to be concerned about the expedients used in such a distribution.
  • uniform data stream may be considered to comprise two major components: the above described document interchange architecture which relates to communication and processing of the document and the document content architecture which is representative of the content and format of a particular document.
  • the document interchange architecture involved in the distribution and processing of documents in distribution networks is described in even greater detail in the article entitled "The Document Interchange Architecture: Member of a Family of Architectures in the SNA Environment", by T. Schick et al, IBM Systems Journal , Vol. 21, No. 2, 1982, at page 220.
  • This article discloses an electronic document distribution system having a network of communicating data processors. Receiving and transmitting means are provided so that documents can be exchanged between processors.
  • the data stream representing the document contains, apart from the document contents, information about "functions required to be performed on the document contents, such as pagination, highlighting, headings, footings, and centering".
  • document distribution networks must have the capability of integrating into the system communicating processors of varying levels of data processing capabilities.
  • Existing document distribution systems such as those described in the above mentioned articles provide for a uniform data stream whereby data processing stations or work stations with varying data processing capability may communicate with each other by tollowing the protocol of the document interchange architecture.
  • distribution systems problems arise when a document from a processor of higher capabilities is communicated to a processor or work station of lower or limited processing capabilities. This problem would be further complicated when it is necessary to further transmit the same document to a subsequent processor having greater or expanded data processing capabilities. This type of interchange may arise in many situations.
  • Fig. 1 is a logical block diagram showing apparatus which may be used in the practice of the present invention.
  • Fig. 2 is a flow chart showing the general steps involved in receiving and processing the data stream representative of a particular document by the apparatus of Fig. 1.
  • Fig. 3 is flow chart of the operations involved utilizing the apparatus of Fig. 1 to reconstitue and transmit or send the original received document data stream after processing has been completed.
  • Fig. 4 is a diagrammatic representation of a data stream with its units and sub-units broken down to the levels dealt with in the present invention.
  • communicating processor 10 is the data processor having a relatively high level of data processing capability.
  • This communicating processor will transmit over linkage 11 the data stream to communicating processor 12 which is a processor having a lower level of data capability with respect to the data stream than does communicating processor 10.
  • Communicating processor 12 will selectively process the received data stream and subsequently transmit this received data stream intact to communicating processor 14 over linkage 13.
  • Communicating processor 14 will for purposes of this illustration be a processor having a higher level of processing capability with respect to the data stream.
  • Processors 10, 12 and 14 and communication linkages 13 and 11 are part of a document distribution network of the type described in the above mentioned M. R. DeSousa and T.
  • communicating processor 12 is a processor having relatively lower level of data processing capability than processors 10 and 14.
  • communicating processor 12 is to have the contents of the document printed at a work station of which communicating processor 12 forms a part. The printing operation involved with respect to the contents of the document is not part of the present invention and will not be shown or described.
  • the document to be printed under the control of processor 12 will be represented by a data stream communicated over linkage 11 to processor 12.
  • the data stream will contain parameters related to processing operations which are within the capabilities of communicating processors 10 and 14 but beyond the capability of processor 12. Let us assume for example that these parameters relate to document length. In other words, some more sophisticated processors like processors 10 or 14 have a capability for utilizing information concerning document length in order to anticipate and plan for the number of pages which the document will require and consequently the number of lines on each particular page. Since the data stream to be transmitted throughout the document distribution network is preferably a uniform one, parameters related to document size are included in the data stream transmitted to processor 12 even though processor 12 has no capability with respect to any document sizing operations.
  • processing parameters such as those related to sizing of the document and the partitioning of the document by number of pages are processing parameters and do not relate to document content, they are customarily included in that portion of the data stream which relates to document distribution or document interchange architecture (DIA) rather than being treated as part of the document content unit in the data stream.
  • DIA document distribution or document interchange architecture
  • a data stream like that shown in Fig. 4 is transmitted over linkage 11 and received by communications adapter 15 in processor 12.
  • This communication adapter may be any standard device having the capability, at the receiving end for converting received serial data communicated over linkage 11 to parallel form so that it may be handled in processor 12 and if there is to be any subsequent transmission from processor 12 onto linkage 13 then for reconverting the parallel data being handled in processor 12 to a serial form so that it may be transmitted or sent over linkage 13.
  • the data stream received through communications adapter 15 is stored in a receive buffer 16 while the synchronous data link control (SDLC) unit 17 determines that the data link control elements in the received data stream as shown in Fig. 4 at the SDLC level of the data stream are proper.
  • SDLC synchronous data link control
  • the activities of the SDLC unit 17 and the SNA unit 18 with respect to the received information in buffer 16 is synchronized through the communications control unit 19 through the buffer control program unit 20 which controls the buffer 16. If the data stream satisfies the requirements of the SDLC and the SNA unit, the buffer control program unit moves the data stream from buffer 16 to document distribution data storage buffer 21. Then, the operations of the present invention to be described with respect to the flow charts in Figs. 2 and 3 will be carried out.
  • DIA document interchange architecture
  • decision block 40 in the received document data stream processing flow chart shown in Fig. 2 which will now be followed in considering the processing operations involved when a document is received within processor 12. If the basic DIU unit is not present, an error condition will be indicated. If the DIU is present, then a determination is made, decision block 41, as to whether the document profile unit is present in the data stream.
  • This document profile unit shown in the illustration of the data stream in Fig. 4 is the basic unit in which various document processing and distribution parameters are contained. Here again, if document profile is not present, then an error condition will be signaled. On the other hand, if the document profile is present, then, block 42, the profile will then be scanned or examined under the control of DIU receive controller 22.
  • the presence of the base profile is determined under the control of the DIU receive controller unit 22.
  • step 44 the processor 12 enters an operation involving steps 44, 45 and 46 wherein all of the parameters in the base profile are examined in sequence and the determination is first made, step 44 as to whether next parameter in the sequence is useable, i.e., whether processor 12 is capable of using the information in the next parameter. If processor 12 is capable, then, step 46, the parameter is extracted from the data stream. If processor 12 is not capable of processing that parameter, then, the process is looped back to step 44 and the next parameter is examined for the same purpose. This procedure is repeated until a determination is made, step 46, that the end of the base profile has been reached. The whole sequence is carried out under the control of profile validation unit 23 shown in the logic of Fig. 1.
  • step 47 i.e., all of the parameters which have been extracted from the base profile of the data stream as being utilizable are transferred from data storage buffer 21 to a diskette storage means 25 in processor 12 through a diskette access method.
  • These stored parameters are now available for the subsequent processing to be carried out on processor 12 with respect to the actual document content. For example, if the parameters relate primarily to a printing operation which is to be carried out on a printer not shown associated with processor 12, when the document contents are subsequently received, parameters stored in the diskette storage means on the document label will be utilized by the processor 12 in controlling the printing operation.
  • processor 12 As previously indicated, the actual printing operation under the control of processor 12 is not considered to be part of the present invention and will not be described. However, if details are desired as to the operation of a typical text processing work station including a processor 12 to print a document, they are provided in European application EP-A-67,288 assigned to the assignee of the present invention While this application uses an synchronous protocol for communication and the present invention uses asynchronous protocol, the general operation of the terminal with respect to display and printing operations will be substantially the same. It should be noted that since communicating processor 12 is a display terminal processor, that if the display is to be utilized it may be accessed through the DIU receive controller 22 acting through session summary logic 26 and display access method 27.
  • step 49 a profile vector is written including these parameters.
  • the non-extracted parameters in the base profile previously examined are removed from the data stream that is stored in buffer 21 and then stored on a diskette 25 through diskette access method 24 as previously described.
  • this write profile vector stored on a diskette in storage means 25 is representative of the parameters which the processor 12 was incapable of executing.
  • the operation proceeds to its next step 50 wherein a portion of the data stream representative of the document content is received in storage buffer 21 under the control of document processor unit 28. Then, in a process involving steps 51 and 52 of Fig. 2 under the control of document processor unit 28, document content vectors are written, i.e., that portion of the data stream representative of document content is transferred to diskette storage 25 via diskette access method 24 in substantially the same manner as previously described with respect to the transfer of processing parameters.
  • processor 12 With the document content appropriately stored in diskette storage 25 and the processing parameters carried out with respect to the printing of the document, for example, under the control of processor 12 also stored in diskette storage 25 as a document label, the processor 12 is now ready to carry out such processing operations. While the processing operations are carried out by processor 12, the processing parameters which processor 12 is incapable of executing remain stored as the write profile vector in diskette storage 25.
  • processor 12 At some stage in subsequent operation either immediately after the performance of the document processing such as printing by processor 12, it may be necessary for processor 12 to transmit the original data stream as received to another processor such as communicating processor 14. Processor 12 has the capability of reconstituting the data stream so that it is substantially identical to the data stream received from processor 10.
  • command queue manager 29 When the reconstituted data stream is to be transmitted to communicating processor 14, an appropriate command is inserted in command queue manager unit 29.
  • the appropriate command may be preset in command queue manager 29.
  • the command may be inserted into command queue manager at the appropriate time either by communication through the network itself or by an operator keying in the request to the queue manager 29.
  • step 53 command queue manager 29 activates DIU send controller unit 30 which will then control reconstitution of the base subprofile portion of the document interchange unit which was the portion previously separated into the document label and profile vector.
  • step 54 document label is read out of storage in the diskette.
  • This document label which contains the extracted parameters from the base profile which processor 12 has carried out is accessed from diskette storage means 25 through diskette access method 24 and stored in the appropriate sequence of the base profile being reconstructed as a portion of a data stream in data storage buffer 21.
  • step 55 and still under the control of the DIU send controller 30, the protile vector which contained the non-extracted parameters, i.e., those which processor 12 was incapable of executing is also read out of diskette storage 25 through diskette access method 24 and stored in its appropriate sequence in the profile of the data stream being reconstituted in data storage buffer 21.
  • the extracted and non-extracted parameters are thus reformatted into the profile of the data stream in data storage buffer 21, step 56.
  • steps 57, 58 and 59 under the control of DIU send controller 30 is carried out which involves reading the document content vector from diskette storage 25 through diskette access method 24 to the data storage buffer 21 and inserting this document content vector as the document content portion of the data stream being reconstituted in buffer 21.
  • the data stream under the supervision of communication control unit 19 is moved into send buffer 31.
  • the SNA unit 18 determines whether or not the reconstituted data stream meets the network architecture requirements. This is carried out through buffer control program 20 which controls the send buffer 31.
  • SDLC unit 17 determines that the data stream when control elements in the data stream in send buffer 31 are proper. If the SDLC and SNA requirements are met in the reconstituted data stream in buffer 31, then, information in buffer 31 is transmitted through communication adapter 15 which makes the parallel serial conversion over linkage 33 to communicating processor 14.
  • communicating processor 14 has a higher level of data processing capability than does processor 12 and particularly with respect to parameters dealing with document sizing and distributioii of the document over a number of pages. Since the data stream being transmitted over link 13 from processor 12 is substantially the same as that originally transmitted to processor 12 over link 11, all of the parameters which processor 12 is incapable of handling have now been reconstituted into the data stream and are available to communicating processor 14 which has the capability for executing these parameters.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Computational Linguistics (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Multimedia (AREA)
  • Communication Control (AREA)
  • Computer And Data Communications (AREA)
  • Information Transfer Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)
  • Multi Processors (AREA)
EP83109604A 1982-11-09 1983-09-27 An electronic document distribution network with uniform data stream Expired - Lifetime EP0108899B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US440484 1982-11-09
US06/440,484 US4532588A (en) 1982-11-09 1982-11-09 Electronic document distribution network with uniform data stream

Publications (3)

Publication Number Publication Date
EP0108899A2 EP0108899A2 (en) 1984-05-23
EP0108899A3 EP0108899A3 (en) 1987-03-25
EP0108899B1 true EP0108899B1 (en) 1994-12-28

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EP83109604A Expired - Lifetime EP0108899B1 (en) 1982-11-09 1983-09-27 An electronic document distribution network with uniform data stream

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US (1) US4532588A (pt)
EP (1) EP0108899B1 (pt)
JP (1) JPS5992652A (pt)
BR (1) BR8306090A (pt)
CA (1) CA1193368A (pt)
DE (1) DE3382775T2 (pt)
ES (1) ES527099A0 (pt)

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Also Published As

Publication number Publication date
JPS5992652A (ja) 1984-05-28
JPH0352262B2 (pt) 1991-08-09
EP0108899A3 (en) 1987-03-25
ES8600536A1 (es) 1985-10-01
DE3382775T2 (de) 1995-06-29
ES527099A0 (es) 1985-10-01
CA1193368A (en) 1985-09-10
BR8306090A (pt) 1984-06-12
DE3382775D1 (de) 1995-02-09
EP0108899A2 (en) 1984-05-23
US4532588A (en) 1985-07-30

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